[Autograding] use containers for tutorial cpp examples (#32)

Author: bmcutler

examples/02_simple_cpp/config/config.json

@@ -1,4 +1,9 @@
 {
+  "autograding_method": "docker",
+  "container_options": {
+      "container_image": "submittyrpi/csci1200:default"
+  },
+
   // For compiled languages, typically two testcases are used to allow points
   // to be asssigned independently for compilation and execution.
   "testcases" : [

examples/05_cpp_static_analysis/config/config.json

@@ -4,6 +4,11 @@
         "submission_to_runner" : [ "*.cpp", "*.c", "*.hpp", "*.h", "*.c", "*.hpp" ]
     },
 
+    "autograding_method": "docker",
+    "container_options": {
+        "container_image": "submittyrpi/csci1200:default"
+    },
+
     // Static analysis can also be performed upon C++ code.
     // Here, no compilation is performed at all; instead, student code is examined to
     // ensure that it does not use either the "goto" or "auto" keywords.

examples/08_memory_debugging/config/config.json

@@ -1,6 +1,10 @@
 {
-    "testcases" : [
+    "autograding_method": "docker",
+    "container_options": {
+        "container_image": "submittyrpi/csci1200:default"
+    },
 
+    "testcases" : [
         // Grading of C++ code can also be supplemented with the use of a memory
         // debugger. Here, the tool Dr. Memory is used to penalize student code
         // containing memory errors.